Don't forget about the Singleton module ("include Singleton"). This one trips me up in terms of what is being referred to as a "singleton". This is more of an s

Don't forget about the Singleton module ("include Singleton"). This one trips me up in terms of what is being referred to as a "singleton". This is more of an singleton class instance where there can only be only one class instance per-class. https://ruby-doc.org/3.4.1/stdlibs/singleton/Singleton.html https://ruby-doc.org/3.4.1/stdlibs/singleton/Singleton.html